What occurs when the moon blocks the view of the sun? neap tide spring tide solar eclipse lunar eclipse

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Consider the story you just read. all but one of the choices below indicate that something is living.